796 Van Duzee: Catalogue of Hemiptera [286914- 



Pateh, Me. Agr. Exp. Sta., Bui., p. 228, 1912. 



Crawford, U. S. Natl. Mus., Bui. 85, p. 89, 1914 (figures). 



helvetma Meyer-Diir, Mitth. Schw. Ent. Ges., iii, pp. 388, 391, 1871. 

 nigrifrons Crawford, Pomona Jl. Eut., ii, pp. 230, 351, 1910 (figures). 

 fulvida Crawford, Pomona Jl. Ent., ii, pp. 231, 358, 1910 (figures). 

 Wsimilis Crawford, Pomona Jl. Ent., ii, pp. 231, 359, 1910 (as var. of fulvida). 

 aurantiaca Ci-awford, Pomona Jl. Ent., ii, pp. 231, 360, 1910 (figures). 



Crawford, Pomona Jl. Ent., iii, pp. 426, 428, 628, 1911. 

 Wfrontalis Crawford, Pomona Jl. Ent., ii, p. 232, 1910 (as var. of aurantiaca) . 

 Host : Salix. 



Localities: 111., Colo., Utah, N. Mex., Nev., Calif., Ore., Wash. 

 (Europe.) 



28691^. Trioza forcipula Patch 

 Patch, Me. Agr. Exp. Sta., Bui. 202, p. 227, 1912. 

 Host : Ulmus. 

 Localities: Ont., N. Y., Colo. 



2869%. Trioza pyrifoliae Forbes 

 Forbes, 14tli Eept. 111. St. Ent., p. 98, 1885. 

 Mally, Proe. la. Acad. Sci., ii, p. 154, 1895 (mention). 



Host: Pyrus. 



Locality : 111. 



2870. Trioza nigrilla Crawf. 



Crawford, Pomona Jl. Ent., iii, p. 503, 1911 (n.n. for nigra Crawf.). 

 ^salicis Mally, Proc. la. Acad. Sci., ii, p. 161, 1895. 



Ci-awford, Pomona Jl. Ent, iii, pp. 426, 428, 432, 1911 (figures). 

 Aulmann, Psyllid. Cat., p. 53, 1913 (listed). 

 Crawford, U. S. Natl. Mus., Bui. 85, p. 91, 1914 (figures). 

 Van Duzee, Check List Hemip., p. 86, No. 2870, 1916. 

 minuta Crawford, Pomona Jl. Ent., ii, p. 232, 1910. 



Crawford, Pomona Jl. Ent., iii, pp. 425, 427, 432, 1911 (figures). 

 \\assimiUs Crawford, Pomona Jl. Ent., ii, p. 233, 1910. 



Crawford, Pomona Jl. Ent., iii, pp. 426, 429, 438, 1911 (figures). 

 ^nigra Crawford, Pomona Jl. Ent., ii, pp. 232, 258, 1910 (figures). 



Crawford, Pomona Jl. Ent., iii, pp. 427, 428, 1911. [minuta Ci-awf.). 

 \\similis Crawford, Pomona Jl. Ent., iii, pp. 425, 427, 433, 1911 (as var. of 

 flori Crawford, Pomona Jl. Ent., iii, p. 503, 1911 (n.n. for assimilis Crawf.). 

 dubia Patch, Me. Agr. Exp. Sta., Bui. 202, p. 226, 1912. 

 pomonae Aulmann, Ent. Eundsch., xxix, p. 144, 1912 (n.n. for assimilis 

 Aulmann, Psyllid. Cat., p. 51, 1913 (listed). [Crawf.). 



louisianae Aulmann, Ent. Eundsch., xxix, p. 144, 1912 (n.n. for nigra 



Aulmann, Psyllid. Cat., p. 48, 1913 (listed). [Crawf.). 



Host: Salix. 

 Localities: D. C, la., Colo., Nev. Calif. "Wash. 



2871. Trioza varians Crawf. 

 Crawford, Pomona Jl. Ent., ii, pp. 231, 361, 1910 (figures). 

 Crawford, Pomona Jl. Ent., iii, pp. 425, 427, 628, 1911. 

 Crawford, U. S. Natl. Mus., Bui. 85, p. 91, 1914 (figures). 



Host: Salix. 



Localities: Colo., Utah, Calif., Albta., Brit. Col. 



